1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
29 * Private data structures, etc for the draw module.
35 * Keith Whitwell <keith@tungstengraphics.com>
40 #ifndef DRAW_PRIVATE_H
41 #define DRAW_PRIVATE_H
44 #include "pipe/p_state.h"
45 #include "pipe/p_defines.h"
47 #include "rtasm/rtasm_x86sse.h"
48 #include "tgsi/exec/tgsi_exec.h"
49 #include "tgsi/util/tgsi_scan.h"
54 struct gallivm_cpu_engine
;
58 * Carry some useful information around with the vertices in the prim pipe.
60 struct vertex_header
{
64 unsigned vertex_id
:16;
68 float data
[][4]; /* Note variable size */
71 /* NOTE: It should match vertex_id size above */
72 #define UNDEFINED_VERTEX_ID 0xffff
74 /* XXX This is too large */
75 #define MAX_VERTEX_SIZE ((2 + PIPE_MAX_SHADER_OUTPUTS) * 4 * sizeof(float))
80 * Basic info for a point/line/triangle primitive.
83 float det
; /**< front/back face determinant */
84 unsigned reset_line_stipple
:1;
87 struct vertex_header
*v
[3]; /**< 1 to 3 vertex pointers */
95 * Base class for all primitive drawing stages.
99 struct draw_context
*draw
; /**< parent context */
101 struct draw_stage
*next
; /**< next stage in pipeline */
103 struct vertex_header
**tmp
; /**< temp vert storage, such as for clipping */
106 void (*point
)( struct draw_stage
*,
107 struct prim_header
* );
109 void (*line
)( struct draw_stage
*,
110 struct prim_header
* );
112 void (*tri
)( struct draw_stage
*,
113 struct prim_header
* );
115 void (*flush
)( struct draw_stage
*,
118 void (*reset_stipple_counter
)( struct draw_stage
* );
120 void (*destroy
)( struct draw_stage
* );
124 #define PRIM_QUEUE_LENGTH 32
125 #define VCACHE_SIZE 32
126 #define VCACHE_OVERFLOW 4
127 #define VS_QUEUE_LENGTH (VCACHE_SIZE + VCACHE_OVERFLOW + 1) /* can never fill up */
130 * Private version of the compiled vertex_shader
132 struct draw_vertex_shader
{
134 /* This member will disappear shortly:
136 const struct pipe_shader_state
*state
;
138 struct tgsi_shader_info info
;
140 void (*prepare
)( struct draw_vertex_shader
*shader
,
141 struct draw_context
*draw
);
143 /* Run the shader - this interface will get cleaned up in the
146 void (*run
)( struct draw_vertex_shader
*shader
,
147 struct draw_context
*draw
,
148 const unsigned *elts
,
150 struct vertex_header
*vOut
[] );
153 void (*delete)( struct draw_vertex_shader
* );
157 /* Internal function for vertex fetch.
159 typedef void (*fetch_func
)(const void *ptr
, float *attrib
);
160 typedef void (*full_fetch_func
)( struct draw_context
*draw
,
161 struct tgsi_exec_machine
*machine
,
162 const unsigned *elts
,
168 * Private context for the drawing module.
172 /** Drawing/primitive pipeline stages */
174 struct draw_stage
*first
; /**< one of the following */
176 struct draw_stage
*validate
;
178 /* stages (in logical order) */
179 struct draw_stage
*flatshade
;
180 struct draw_stage
*clip
;
181 struct draw_stage
*cull
;
182 struct draw_stage
*twoside
;
183 struct draw_stage
*offset
;
184 struct draw_stage
*unfilled
;
185 struct draw_stage
*stipple
;
186 struct draw_stage
*aapoint
;
187 struct draw_stage
*aaline
;
188 struct draw_stage
*pstipple
;
189 struct draw_stage
*wide_line
;
190 struct draw_stage
*wide_point
;
191 struct draw_stage
*rasterize
;
194 /* pipe state that we need: */
195 const struct pipe_rasterizer_state
*rasterizer
;
196 struct pipe_viewport_state viewport
;
197 struct pipe_vertex_buffer vertex_buffer
[PIPE_ATTRIB_MAX
];
198 struct pipe_vertex_element vertex_element
[PIPE_ATTRIB_MAX
];
199 struct draw_vertex_shader
*vertex_shader
;
201 uint num_vs_outputs
; /**< convenience, from vertex_shader */
203 /* user-space vertex data, buffers */
205 /** vertex element/index buffer (ex: glDrawElements) */
207 /** bytes per index (0, 1, 2 or 4) */
211 const void *vbuffer
[PIPE_ATTRIB_MAX
];
213 /** constant buffer (for vertex shader) */
214 const void *constants
;
217 /* Clip derived state:
222 float wide_point_threshold
; /**< convert pnts to tris if larger than this */
223 float wide_line_threshold
; /**< convert lines to tris if wider than this */
226 /* If a prim stage introduces new vertex attributes, they'll be stored here
234 unsigned reduced_prim
;
236 /** TGSI program interpreter runtime state */
237 struct tgsi_exec_machine machine
;
239 /* Vertex fetch internal state
242 const ubyte
*src_ptr
[PIPE_ATTRIB_MAX
];
243 unsigned pitch
[PIPE_ATTRIB_MAX
];
244 fetch_func fetch
[PIPE_ATTRIB_MAX
];
246 full_fetch_func fetch_func
;
249 /* Post-tnl vertex cache:
252 unsigned referenced
; /**< bitfield */
255 unsigned in
; /* client array element */
256 unsigned out
; /* index in vs queue/array */
257 } idx
[VCACHE_SIZE
+ VCACHE_OVERFLOW
];
261 /** To find space in the vertex cache: */
262 struct vertex_header
*(*get_vertex
)( struct draw_context
*draw
,
266 /* Vertex shader queue:
270 unsigned elt
; /**< index into the user's vertex arrays */
271 struct vertex_header
*vertex
;
272 } queue
[VS_QUEUE_LENGTH
];
278 * Run the vertex shader on all vertices in the vertex queue.
280 void (*shader_queue_flush
)(struct draw_context
*draw
);
282 /* Prim pipeline queue:
285 /* Need to queue up primitives until their vertices have been
286 * transformed by a vs queue flush.
288 struct prim_header queue
[PRIM_QUEUE_LENGTH
];
293 /* This (and the tgsi_exec_machine struct) probably need to be moved somewhere private.
295 struct gallivm_cpu_engine
*engine
;
296 void *driver_private
;
301 extern struct draw_stage
*draw_unfilled_stage( struct draw_context
*context
);
302 extern struct draw_stage
*draw_twoside_stage( struct draw_context
*context
);
303 extern struct draw_stage
*draw_offset_stage( struct draw_context
*context
);
304 extern struct draw_stage
*draw_clip_stage( struct draw_context
*context
);
305 extern struct draw_stage
*draw_flatshade_stage( struct draw_context
*context
);
306 extern struct draw_stage
*draw_cull_stage( struct draw_context
*context
);
307 extern struct draw_stage
*draw_stipple_stage( struct draw_context
*context
);
308 extern struct draw_stage
*draw_wide_line_stage( struct draw_context
*context
);
309 extern struct draw_stage
*draw_wide_point_stage( struct draw_context
*context
);
310 extern struct draw_stage
*draw_validate_stage( struct draw_context
*context
);
313 extern void draw_free_temp_verts( struct draw_stage
*stage
);
315 extern void draw_alloc_temp_verts( struct draw_stage
*stage
, unsigned nr
);
317 extern void draw_reset_vertex_ids( struct draw_context
*draw
);
320 extern int draw_vertex_cache_check_space( struct draw_context
*draw
,
323 extern void draw_vertex_cache_invalidate( struct draw_context
*draw
);
324 extern void draw_vertex_cache_unreference( struct draw_context
*draw
);
325 extern void draw_vertex_cache_reset_vertex_ids( struct draw_context
*draw
);
327 extern void draw_vertex_shader_queue_flush( struct draw_context
*draw
);
329 struct tgsi_exec_machine
;
331 extern void draw_update_vertex_fetch( struct draw_context
*draw
);
334 #define DRAW_FLUSH_SHADER_QUEUE 0x1 /* sized not to overflow, never raised */
335 #define DRAW_FLUSH_PRIM_QUEUE 0x2
336 #define DRAW_FLUSH_VERTEX_CACHE 0x4
337 #define DRAW_FLUSH_STATE_CHANGE 0x8
338 #define DRAW_FLUSH_BACKEND 0x10
341 void draw_do_flush( struct draw_context
*draw
, unsigned flags
);
346 * Get a writeable copy of a vertex.
347 * \param stage drawing stage info
348 * \param vert the vertex to copy (source)
349 * \param idx index into stage's tmp[] array to put the copy (dest)
350 * \return pointer to the copied vertex
352 static INLINE
struct vertex_header
*
353 dup_vert( struct draw_stage
*stage
,
354 const struct vertex_header
*vert
,
357 struct vertex_header
*tmp
= stage
->tmp
[idx
];
358 const uint vsize
= sizeof(struct vertex_header
)
359 + stage
->draw
->num_vs_outputs
* 4 * sizeof(float);
360 memcpy(tmp
, vert
, vsize
);
361 tmp
->vertex_id
= UNDEFINED_VERTEX_ID
;
366 dot4(const float *a
, const float *b
)
368 float result
= (a
[0]*b
[0] +
376 #endif /* DRAW_PRIVATE_H */